213147 has 12 divisors (see below), whose sum is σ = 336024. Its totient is φ = 129120.

The previous prime is 213139. The next prime is 213149. The reversal of 213147 is 741312.

It is not a de Polignac number, because 213147 - 2³ = 213139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 978 + ... + 1175.

It is an arithmetic number, because the mean of its divisors is an integer number (28002).

2²¹³¹⁴⁷ is an apocalyptic number.

213147 is a deficient number, since it is larger than the sum of its proper divisors (122877).

213147 is a wasteful number, since it uses less digits than its factorization.

213147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170 (or 2167 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 213147 is about 461.6784595365. The cubic root of 213147 is about 59.7346616558.

Adding to 213147 its reverse (741312), we get a palindrome (954459).

It can be divided in two parts, 21314 and 7, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 213147 in words is "two hundred thirteen thousand, one hundred forty-seven".